Estate Planning After Remarriage in Ontario: Protecting Children and Spouses

Remarriage changes more than your relationship status. It changes your legal obligations, your financial exposure, and the way your estate may ultimately be distributed.

Many individuals who remarry may already have children, ac

cumulated assets, and have an existing estate plan. If an existing estate plan is not reviewed and updated, it may no longer reflect your current intentions.

After remarriage in Ontario, estate planning considerations such as statutory spousal rights, guardianship considerations, beneficiary designations, and trust planning options should all be reassessed in light of your new legal and family structure.

A comprehensive update to your estate plan helps ensure your new spouse is supported while your long-term intentions for your children are preserved.

Spousal Rights in Ontario After Remarriage

Remarriage creates statutory rights that directly affect your estate plan.

In Ontario, a married spouse may elect to claim an equalization of net family property instead of accepting what is provided under your Will. In certain circumstances, a spouse may also bring a dependent support claim if they believe they were not adequately provided for.

These rights exist regardless of the wording of your Will and must be addressed through coordinated planning. Because of these statutory rights, your estate plan should be reviewed alongside any existing marriage contract. A properly drafted marriage contract can clarify property division and inheritance expectations.

It is equally important to review beneficiary designations on RRSPs, RRIFs, TFSAs, and life insurance policies. These assets typically pass outside your Will and can significantly affect the overall distribution of your estate if they are not aligned with your intentions.

Balancing a New Spouse and Children from a Prior Relationship

Remarriage often creates competing financial priorities. You may want to provide security for your new spouse while also preserving assets for children from a previous relationship.

If your Will leaves assets outright to your spouse, those assets legally become your spouse’s property and may later be distributed according to their own estate plan. If your Will directs assets immediately to your children, your spouse may not have sufficient financial support.

A structured estate plan can address both concerns.

For example, your Will may grant your spouse a life interest in the matrimonial home, allowing them to live there for their lifetime while directing that ownership ultimately passes to your children upon your spouse’s death. In other situations, more advanced structuring may be required to support a spouse while preserving assets for children. The appropriate approach depends on the size of the estate, the financial needs of the surviving spouse, and your long-term distribution objectives.

Because these arrangements often require ongoing administration, the choice of executor becomes especially important in a remarriage. An executor must manage the estate impartially and in accordance with the Will, often navigating sensitive family dynamics between a surviving spouse and children from a prior relationship. Careful consideration should be given to choosing the right executor.

Spousal Trusts as a Planning Tool After Remarriage

One of the most common tools used in estate planning after remarriage is a spousal trust.

A spousal trust allows you to provide financial support to your spouse during their lifetime, while still controlling where the remaining assets go after they pass away. Instead of leaving assets directly to your spouse, those assets are held in a trust for their benefit.

If properly structured, the assets can generally transfer into the trust without triggering immediate tax at the time of your death. Your spouse is entitled to receive income from the trust during their lifetime, and no one else can access the capital while they are alive.

When your spouse dies, whatever remains in the trust passes to the beneficiaries you have named in your Will, such as your children from a prior relationship.

This approach is frequently used to balance ensuring your spouse is financially secure, while preserving your estate for your chosen beneficiaries. It can also help reduce the risk that assets are redirected outside your intended plan in the event of a future remarriage.

Guardianship of Minor Children After Remarriage

If you have children under 18 from a prior relationship, remarriage raises important questions about who would care for them if you were to die.

Your Will should clearly set out your guardianship wishes. Although Ontario courts have final authority to confirm guardianship, your written appointment carries significant weight.

Under Ontario’s Children’s Law Reform Act, a parent may appoint a person in their Will to assume decision-making responsibility for a child. That appointment takes effect on death but must be confirmed by the court for ongoing authority. The court determines guardianship based on the child’s best interests, and a parent’s documented wishes are an important factor in that assessment.

A new spouse does not automatically become a legal parent unless they have formally adopted the child. If both legal parents die without written instructions, the court will determine who assumes care.

Guardianship planning should also address financial management. Your Will can establish a trust for minor children, so assets are managed by a trustee until an age you specify. This prevents a child from receiving a full inheritance at 18 and provides structured support for education and long-term needs.

Including Stepchildren in Your Estate Plan

Under Ontario succession law, stepchildren do not automatically inherit from a stepparent. If you want a stepchild to receive part of your estate, your Will must specifically include them, or you must name them as beneficiaries of particular assets.

Some individuals in remarriages wish to treat all children equally. Others choose to prioritize biological children while providing specific gifts to stepchildren. There is no universal formula, but your estate plan must clearly state your decision.

Where stepchildren are minors or financially inexperienced, a trust may be appropriate to ensure that any inheritance is administered according to your stated intentions. This can be particularly helpful in remarriage situations where you want to provide support while maintaining clear boundaries around how assets are managed.

Mutual Wills in a Remarriage

In some remarriages, spouses want reassurance that the plan they agree on today will still be followed after the first spouse dies.

A Mutual Will arrangement is one way to try to achieve that. In simple terms, both spouses agree that their Wills reflect a shared plan for how assets will be distributed, and that the surviving spouse will not later change that plan.

However, Mutual Wills are not as simple as they sound. For them to be enforceable, the agreement must be clearly documented and carefully drafted. They also reduce flexibility. If circumstances change after the first death, the surviving spouse may not be able to adjust the plan.

Because Mutual Wills can create binding obligations, they should only be considered after obtaining detailed legal advice and fully understanding the long-term consequences.

Remarriage should prompt a thorough review of your estate planning documents, including your Will, powers of attorney, beneficiary designations, jointly held assets, and any existing marriage contract. Estate planning after remarriage in Ontario requires coordinated drafting that addresses spousal rights and protects your children’s interests.

If you have remarried and want to ensure your plan reflects your current family structure, E is for Estates can help. Contact us to review and update your documents so your spouse and children are protected in a legally sound and carefully structured plan.

This article is intended for informational purposes only. For personalized advice tailored to your specific circumstance, please reach out to the E is for Estates team.

Erin L. Watson, B.A., JD

Lawyer & Notary Public

E is for Estates